    New chain ID            Original chain ID

7jk9-pdb-bundle1.pdb:
           A                         A
           B                         B
           C                         C
           D                         D
           E                         E
           F                         F
           G                         G
           H                         H
           I                         I
           J                         J
           K                         K
           L                         L
           M                         M
           N                         N
           O                         O
           P                         P
           Q                         Q
           R                         R
           S                         S
           T                         T

7jk9-pdb-bundle2.pdb:
           A                         V
           B                         W
           C                         X
           D                         Y
           E                         Z
           F                        AA
           G                        BA
           H                        CA
           I                        DA
           J                        EA
           K                        FA
           L                        GA
           M                        HA
           N                        IA
           O                        JA
           P                        KA
           Q                        LA
           R                        MA
           S                        NA
           T                        OA
